1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/*
* Copyright (C) 2005-2020 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#include "DMAHeapBufferObject.h"
#include "ServiceBroker.h"
#include "utils/BufferObjectFactory.h"
#include "utils/log.h"
#include <array>
#include <drm_fourcc.h>
#include <fcntl.h>
#include <linux/dma-heap.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <unistd.h>
namespace
{
std::array<const char*, 3> DMA_HEAP_PATHS = {
"/dev/dma_heap/reserved",
"/dev/dma_heap/linux,cma",
"/dev/dma_heap/system",
};
static const char* DMA_HEAP_PATH;
} // namespace
std::unique_ptr<CBufferObject> CDMAHeapBufferObject::Create()
{
return std::make_unique<CDMAHeapBufferObject>();
}
void CDMAHeapBufferObject::Register()
{
for (auto path : DMA_HEAP_PATHS)
{
int fd = open(path, O_RDWR);
if (fd < 0)
{
CLog::Log(LOGDEBUG, "CDMAHeapBufferObject::{} unable to open {}: {}", __FUNCTION__, path,
strerror(errno));
continue;
}
close(fd);
DMA_HEAP_PATH = path;
break;
}
if (!DMA_HEAP_PATH)
return;
CLog::Log(LOGDEBUG, "CDMAHeapBufferObject::{} - using {}", __FUNCTION__, DMA_HEAP_PATH);
CBufferObjectFactory::RegisterBufferObject(CDMAHeapBufferObject::Create);
}
CDMAHeapBufferObject::~CDMAHeapBufferObject()
{
ReleaseMemory();
DestroyBufferObject();
close(m_dmaheapfd);
m_dmaheapfd = -1;
}
bool CDMAHeapBufferObject::CreateBufferObject(uint32_t format, uint32_t width, uint32_t height)
{
if (m_fd >= 0)
return true;
uint32_t bpp{1};
switch (format)
{
case DRM_FORMAT_ARGB8888:
bpp = 4;
break;
case DRM_FORMAT_ARGB1555:
case DRM_FORMAT_RGB565:
bpp = 2;
break;
default:
throw std::runtime_error("CDMAHeapBufferObject: pixel format not implemented");
}
m_stride = width * bpp;
return CreateBufferObject(width * height * bpp);
}
bool CDMAHeapBufferObject::CreateBufferObject(uint64_t size)
{
m_size = size;
if (m_dmaheapfd < 0)
{
m_dmaheapfd = open(DMA_HEAP_PATH, O_RDWR);
if (m_dmaheapfd < 0)
{
CLog::LogF(LOGERROR, "failed to open {}:", DMA_HEAP_PATH, strerror(errno));
return false;
}
}
struct dma_heap_allocation_data allocData{};
allocData.len = m_size;
allocData.fd_flags = (O_CLOEXEC | O_RDWR);
allocData.heap_flags = 0;
int ret = ioctl(m_dmaheapfd, DMA_HEAP_IOCTL_ALLOC, &allocData);
if (ret < 0)
{
CLog::Log(LOGERROR, "CDMAHeapBufferObject::{} - ioctl DMA_HEAP_IOCTL_ALLOC failed, errno={}",
__FUNCTION__, strerror(errno));
return false;
}
m_fd = allocData.fd;
m_size = allocData.len;
if (m_fd < 0 || m_size <= 0)
{
CLog::Log(LOGERROR, "CDMAHeapBufferObject::{} - invalid allocation data: fd={} len={}",
__FUNCTION__, m_fd, m_size);
return false;
}
return true;
}
void CDMAHeapBufferObject::DestroyBufferObject()
{
if (m_fd < 0)
return;
int ret = close(m_fd);
if (ret < 0)
CLog::Log(LOGERROR, "CDMAHeapBufferObject::{} - close failed, errno={}", __FUNCTION__,
strerror(errno));
m_fd = -1;
m_stride = 0;
m_size = 0;
}
uint8_t* CDMAHeapBufferObject::GetMemory()
{
if (m_fd < 0)
return nullptr;
if (m_map)
{
CLog::Log(LOGDEBUG, "CDMAHeapBufferObject::{} - already mapped fd={} map={}", __FUNCTION__,
m_fd, fmt::ptr(m_map));
return m_map;
}
m_map = static_cast<uint8_t*>(mmap(nullptr, m_size, PROT_WRITE, MAP_SHARED, m_fd, 0));
if (m_map == MAP_FAILED)
{
CLog::Log(LOGERROR, "CDMAHeapBufferObject::{} - mmap failed, errno={}", __FUNCTION__,
strerror(errno));
return nullptr;
}
return m_map;
}
void CDMAHeapBufferObject::ReleaseMemory()
{
if (!m_map)
return;
int ret = munmap(m_map, m_size);
if (ret < 0)
CLog::Log(LOGERROR, "CDMAHeapBufferObject::{} - munmap failed, errno={}", __FUNCTION__,
strerror(errno));
m_map = nullptr;
}
|
